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SRN 017-Final.Pub Sandalwood Research Newsletter February 2003 Issue 17 ISSN 1321-0022X EDITOR’S NOTE This edition of the SRN examines host trials with quandong (Santalum acuminatum) and genetic variation within Indian sandalwood (Santalum album). In South Australia, S. acuminatum is being grown in plantations for its edible red fruit. Matthew Lethbridge is examining S. acuminatum performance with different Acacia species that also have the potential for commercial use in the wattle seed industry. In previous trials, Acacia species have proven to be very good hosts for S. spicatum and S. album. Studies on S. album from India and West Timor indicate that there is a high degree of variation within the species, and there may in fact be separate varieties or races. Within India, Angadi, Jain and Shankaranarayana examine the levels of genetic diversity within and between eight populations of S. album. Jain, Angandi and Shankaranarayana also discuss environmental, morphometric and genetic characteristics of nine S. album populations growing within India. Recently I changed Departments, and I now work for the Forest Products Commission, Western Australia. However I am still researching sandalwood and I will continue to be editor of the SRN. My new mailing address is shown at the end of this newsletter. Jon Brand acacias as host plants for quandong Progress report: Integrated wattle and quandong orchard fruit production. Matthew Lethbridge Materials and Methods Australian Quandong Industry Association (AQIA), P.O. Box 1160, Loxton, South Australia, 5333 Within the research area of the Aus- tralian Arid Land Botanic Gardens is Abstract a chenopod heathland (predominantly Eight species of semi arid acacia species with potential for wattle seed produc- Atriplex and Maireana species, these tion in the native food industry were tested for there suitability as hosts for quan- were retained) of deep alkaline (pH dong (Santalum acuminatum) in an irrigated area at the Australian Arid Lands 9.5) loam of zero inclination. The Botanic Gardens, Port Augusta, South Australia. Preliminary results indicate area had been previously deep ripped that Acacia victoriae is superior to the seven other species tested. (1992). Eight species of semi-arid acacia (Table 1) were planted in a grid pattern of 6 m by 4 m. Each species Introduction A survey by Maslin et al (1998) iden- was planted as two rows of 11 plants tified 47 species of acacia that have from tube stock grown on site. They The quandong fruit (Santalum acumi- potential for both seed production for were irrigated with single drippers (8 natum) and wattle seed from acacia human consumption and cultivation in litres per hour) at the base of each species occupy significant niches in the southern semi arid regions of acacia for 2hrs, twice a week (32 li- the fledgling native food industry Southern Australia. There has been a tres per week). Acacia papyrocarpa, (Graham and Hart 1996, Ahmed and small but increasing demand for wat- A. victoriae and Santalum acumi- Johnson 2000). Acacia species are tle seed in the native food industry natum occur naturally on the site showing significant promise in the and is part of investigations (all be it (outside the irrigated area). sandalwood industry as host plants, minor) into the commercial output in (Brand et al., 2001, Radomiljac et al., the broad scale planting of acacias to Procedure 1999a) with the expectation that legu- combat dryland salinity (Simpson and In September 1999, the acacia seeds minous species could also provide Chudleigh 2001). The current study were germinated and transplanted to valuable timber products. is extending the theme of utilising the large forestry tubes. At age seven multipurpose nature of leguminous inside... Progress report: Integrated wattle and quandong orchard Pages 1-4 Genetic diversity between sandal populations …. in India Pages 4-5 Edaphic, environmental and genetic factors associated with growth … Pages 6-7 months, the acacia seedlings were Table 1. The Eight acacia species and their seed source, selected as hosts for planted with a handful of slow release S. acuminatum. The species were selected from the list prepared by Maslin native Osmocote and mulching. (1998) and suitability for the site. There was no further addition of fer- tiliser to the site. In April 2001, two Species Source germinated kernels of quandong (orchard derived seed, Whyalla South A. murrayana 70 km. West of Cobar (AALBG collection) Australia) were direct seeded within A. victoriae Kenmore Park SW (thornless) (AALBG) ten centimeters of each dripper. Quandong heights were recorded in A. rivalis RG 554 K (Australian Bush products) April 2002 and October 2002 (Figures A brumalis CALM D1001 1 and 2). A calamifolia 44 Km. West of Yunta (AALBG) Statistics A hakeoides Quorn (AALBG) Quandong mean heights were com- pared using one-way ANOVA, and A hemiteles CALM N98177 Least Significant Difference (LSD) A. argyrophylla Carrieton (AALBG) tests. of quandong seedlings can be prob- victoriae is currently the most impor- Results lematical. The most economic and tant wattle used in the Australian Na- efficient method for establishing S. tive Food Industry (Maslin 1998), and It is evident from the results (Table 2) spicatum is by direct seeding. (Brand is likely to continue so, given its po- that Acacia victoriae appears to be a and Jones 1999). This methodology tential dual role. Native food growers superior host to the seven other se- may have practical use in the quan- have used this combination because of lected native food acacias. None of dong industry. its native food association and proba- the quandongs showed any obvious bly more as a legume of convenience nutrient deficiency symptoms by vis- than from scientific rational ual leaf inspection. (see Barrett et al “Acacia victoriae is currently the (Schwarz, 2001). 1993). It was also noted that where most important wattle used in the two germinants survived, both plants Australian Native Food Industry “ A significant feature of Acacia victo- usually showed similar heights, per- riae is its high salt tolerance (Maslin haps indicating the vital role of the Discussion 1998). Santalum acuminatum is clas- host acacia’s root system in sustaining sified as a salt tolerant plant (Walker growth of the quandong. It should Quandongs planted near Acacia victo- 1989). Hence this combination may also be noted that the quandong sur- riae showed significantly better have value in salt land reclamation. vival from germinated seed was growth characteristics for the first 18 Neither species has yet been recog- 53 ± 4.5 % across the eight species, months of growth when compared to nised for this purpose (Marcar 1995). and for Acacia victoriae 50 % of the the other seven host species at this It is also reasonable to assume that planted germinated seed survived. It site. From a commercial point of studies with other combinations of is often reported that transplantation view this is a good result as Acacia acacia/ santalum may have some pre- (a). (b). Figure 1ab. Quandong, age 18 months, growing with 30 month old (a) Acacia victoria—quandong ht: 1.24 m; and (b) Aca- cia argophylla—quandong ht: 1.1 m. Table 2. Growth parameters of quandong (18 month old) associated with indi- Barrett D. and Fox J., (1993). Santa- cated acacia species (30 months old). Same letter following score indicates that lum album. Photographic record of they are not significantly different (LSD 0.05). nutrient deficiency symptoms in seedlings Aisuli 6, 1993 Species Average Quandong Brand, J.E., Crombie, D.S. and ht. (cm.), October 2002 Mitchell, M.D. (2000). Establish- ment and growth of sandalwood A. victoriae 98.2 a (Santalum spicatum) in south- A. hemiteles 81.0 b western Australia: the influence of host species. Australian Forestry A. argyrophylla 74.7 bc 63 (1): 60-65. A. murrayana 68.6 bc Brand, J.E., Fox, J.E.D. and Moretta, P. (2001). Review of research into A. calamifolia 66.2 cd sandalwood (Santalum spicatum) A. rivalis 62.0 cd tree farm systems in south-western Australia. In Conference Proceed- A. brumalis 58.2 cd ings: Forests in a Changing Land- A. hakeoides 52.6 d scape: 16th Commonwealth For- estry Conference jointly with the 19th Biennial Conference of the dictive value in species selection. A ductions in growth. A study of the Institute of Foresters of Australia, S. album host study by Radomiljac water use rates of the eight species Fremantle, Western Australia, 18- (1999a) included Acacia ampliceps, used in this study and others may 25 April, 2001 Promaco Conven- which has high salt tolerance (Marcar yield some useful correlations with tions, Perth, pp. 527-535. 1995) and out performed Acacia the hemi parasites growth rate. A Brand J. and Jones P. (1999). Grow- trachycarpa as a host for tropical san- host study by Brand et al (2000) con- ing Sandalwood (Santalum spica- dalwood. Another pot study by Byrne cluded that the faster growth rate of S. tum ) on farmland in Western Aus- (1998) used the highly salt tolerant spicatum near A. acuminata did not tralia. Sandalwood Information A. cyclops (Marcar 1995) but could appear to be due to greater access to sheet No 1. CALM. not recommend this species as a good water, especially during the summer Bryne B. (1998). The Physiology and host. period but this study compared Aca- Biochemistry of the interaction be- cia, Allocasuarina and Eucalyptus tween the root hemiparasite Santa- Acacia brumalis has sometimes been species, where nutritional differences lum acuminatum and its host plants. found growing in moderately saline may be more significant. Ph. D. Thesis, Flinders University soils (Maslin 1998), but in this study Host : parasite interactions are clearly (South Australia). it did not stand out as a host for quan- complex and empirical data will al- Graham C., Hart D. (1997). Bush- dong.
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